I have a 97 350 Vortec engine in a 2001 S-10 punched out to 383. With the cam, heads, headers, ported and polished heads, marine MPFI intake, 27lb injectors, and CAI, it is really hard to start this engine. I have tried varying table B0102 and B4343 to make it start a lot easier but with no success. With B4343 where it is now, is the only way i can get it to start without having to shove my foot in the pedal. The injectors are spec'd out correctly and I have proper fuel pressure when cranking. Just seems like I have way too much timing or too much fuel!
NEW CL.tun
I'm using COS5 with a 2002 Chevy Express Van tune in a 0411 pcm. I have the same issues no matter if I keep the factory OS or use the custom.